trl-lib/gpt-oss-20b-chess
Text Generation • 21B • Updated • 1
PuzzleId large_stringlengths 5 5 | Rating uint16 399 3.32k | Themes listlengths 1 13 | prompt listlengths 1 1 | completion listlengths 1 1 |
|---|---|---|---|---|
CRLU8 | 1,704 | [
"advantage",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . . r . k .\np . p . . p p .\nB . p b . . . p\n. . . b . . . .\n. . P . p . . q\n. . . . Q . . .\nP P . P . P P P\nR . B . . R K .\n\nFEN: r3r1k1/p1p2pp1/B1pb3p/3b4/2P1p2q/4Q3/PP1P1PPP/R1B2RK1 w - - 1 17\nLegal moves (UCI): a1b1 a2a3 a2a4 a6b... | [
{
"role": "assistant",
"content": "g2g3"
}
] |
1geFP | 1,202 | [
"advantage",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\nr . . r . . . .\np p . . . k . .\n. . . . p . . p\n. . p . Q . p .\n. . B . . R . P\n. . P P . q . .\nP P . . . P . .\n. . K R . . . .\n\nFEN: r2r4/pp3k2/4p2p/2p1Q1p1/2B2R1P/2PP1q2/PP3P2/2KR4 b - - 0 24\nLegal moves (UCI): f3f4 f7e7 f7e8 f7g6 f7g... | [
{
"role": "assistant",
"content": "f3f4"
}
] |
sgHm8 | 3,062 | [
"crushing",
"enPassant",
"long",
"middlegame",
"quietMove"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . q r . k .\nb p . n . . p .\n. . . . b . Q .\nP P p p . . . .\n. . . P . R . .\nB . N p P . . .\n. . . . . . P P\n. . . . . R K .\n\nFEN: r2qr1k1/bp1n2p1/4b1Q1/PPpp4/3P1R2/B1NpP3/6PP/5RK1 w - c6 0 24\nLegal moves (UCI): a3b2 a3b4 a3c1 a3c5 a... | [
{
"role": "assistant",
"content": "b5c6"
}
] |
hkVMo | 1,158 | [
"endgame",
"long",
"mate",
"mateIn3"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nk . . . . . . .\n. p r q . p p .\n. Q p . p . p .\n. . P . . . . .\n. . R . . . . .\n. P . . . . . .\nP . . . . P . .\n. . K . . . . .\n\nFEN: k7/1prq1pp1/1Qp1p1p1/2P5/2R5/1P6/P4P2/2K5 w - - 1 36\nLegal moves (UCI): a2a3 a2a4 b3b4 b6a5 b6a6 b6a7 ... | [
{
"role": "assistant",
"content": "c4a4"
}
] |
Uwl3F | 1,071 | [
"crushing",
"defensiveMove",
"endgame",
"queenRookEndgame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\np k . r . K . P\n. p . . . . . .\n. P . r . . . .\nP . . . . . . .\n. . . . . . Q .\n. . . . . . . .\n. . . . . . . .\n\nFEN: 8/pk1r1K1P/1p6/1P1r4/P7/6Q1/8/8 w - - 5 82\nLegal moves (UCI): f7e6 f7e8 f7f6 f7f8 f7g6 f7g8\n\nFind th... | [
{
"role": "assistant",
"content": "f7e6"
}
] |
2wYQb | 1,157 | [
"kingsideAttack",
"mate",
"mateIn2",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . b . . . k .\n. . . . . r p p\np N . R . . . .\n. p p . b . . .\n. . . . . . . .\n. . . . P . . .\nP P P . . . P P\n. . . . . R K .\n\nFEN: r1b3k1/5rpp/pN1R4/1pp1b3/8/4P3/PPP3PP/5RK1 w - - 0 20\nLegal moves (UCI): a2a3 a2a4 b2b3 b2b4 b6a4 b6a8... | [
{
"role": "assistant",
"content": "d6d8"
}
] |
AbfjW | 1,499 | [
"mate",
"mateIn2",
"middlegame",
"sacrifice",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . r . r . k\n. . . . . . p .\n. . . . . . Q N\n. p R . . . . .\n. P . . . . . .\nP . . . n P . .\n. . . q . . P P\n. . R . . . . K\n\nFEN: 3r1r1k/6p1/6QN/1pR5/1P6/P3nP2/3q2PP/2R4K b - - 0 34\nLegal moves (UCI): d2a2 d2b2 d2b4 d2c1 d2c2 d2c3 d... | [
{
"role": "assistant",
"content": "d2d1"
}
] |
Xqwkf | 1,911 | [
"advantage",
"master",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . r r . . k .\np p p . . p p p\n. . . . q . . .\n. . Q p . b . .\n. . . P . . . .\nP N . . P . P .\nn P . . . P B P\n. . R . . R K .\n\nFEN: 2rr2k1/ppp2ppp/4q3/2Qp1b2/3P4/PN2P1P1/nP3PBP/2R2RK1 w - - 3 19\nLegal moves (UCI): a3a4 b3a1 b3a5 b3d2 ... | [
{
"role": "assistant",
"content": "c1a1"
}
] |
0WVB3 | 1,054 | [
"crushing",
"discoveredAttack",
"master",
"middlegame",
"queensideAttack",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . . . . .\np . p k . . . p\nq . . p . . p .\n. r . . . r b .\n. . Q B . . . .\n. . P . . P . .\nP P . . . P . P\n. K . R R . . .\n\nFEN: 8/p1pk3p/q2p2p1/1r3rb1/2QB4/2P2P2/PP3P1P/1K1RR3 b - - 12 25\nLegal moves (UCI): a6a2 a6a3 a6a4 a6a5 a6b... | [
{
"role": "assistant",
"content": "b5b2"
}
] |
Ded1E | 1,656 | [
"advancedPawn",
"kingsideAttack",
"long",
"mate",
"mateIn3",
"middlegame",
"promotion",
"sacrifice"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. r . . . r . k\n. . . . . . . p\np . Q . N . p .\n. p . . b . . .\n. . . . . . . .\nP . . P . . . P\nB . P q p . P .\n. R . . R . . K\n\nFEN: 1r3r1k/7p/p1Q1N1p1/1p2b3/8/P2P3P/B1Pqp1P1/1R2R2K b - - 2 28\nLegal moves (UCI): a6a5 b5b4 b8a8 b8b6 b8b... | [
{
"role": "assistant",
"content": "d2e1"
}
] |
MtxVA | 2,908 | [
"advantage",
"clearance",
"defensiveMove",
"endgame",
"pin",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\nR . . . . p k .\nn . . B . . p .\n. . . p P . . p\n. . . P . . . P\n. . . . P . . .\nr . . . . n P .\n. . . . . . K .\n\nFEN: 8/R4pk1/n2B2p1/3pP2p/3P3P/4P3/r4nP1/6K1 w - - 1 30\nLegal moves (UCI): a7a6 a7a8 a7b7 a7c7 a7d7 a7e7 a7... | [
{
"role": "assistant",
"content": "e5e6"
}
] |
Nn3Lk | 1,673 | [
"crushing",
"endgame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\n. . . . . . p k\n. b b . r . . p\n. . . P . . . .\n. B P . . . . .\n. . . . . R . P\n. . . . . . P K\n. . . . . . . .\n\nFEN: 8/6pk/1bb1r2p/3P4/1BP5/5R1P/6PK/8 w - - 3 44\nLegal moves (UCI): b4a3 b4a5 b4c3 b4c5 b4d2 b4d6 b4e1 b4e... | [
{
"role": "assistant",
"content": "d5e6"
}
] |
4bsCF | 1,136 | [
"crushing",
"endgame",
"master",
"short",
"skewer"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. Q . . . . . .\n. . . . . . . .\n. . . K . . . .\np P . . . k . .\nP . . . . . . p\n. . . . . . p P\n. . . . . . B .\n. . . . q . . .\n\nFEN: 1Q6/8/3K4/pP3k2/P6p/6pP/6B1/4q3 b - - 0 76\nLegal moves (UCI): e1a1 e1b1 e1b4 e1c1 e1c3 e1d1 e1d2 e1e2 ... | [
{
"role": "assistant",
"content": "e1e5"
}
] |
M2JlE | 651 | [
"mate",
"mateIn1",
"middlegame",
"oneMove"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . b . . r k .\n. p . . n . p .\np . p . p . . p\n. . . . N . . .\n. . P P Q B . .\nP . q . . . . .\n. . B . . P P P\nR . . . . . K .\n\nFEN: r1b2rk1/1p2n1p1/p1p1p2p/4N3/2PPQB2/P1q5/2B2PPP/R5K1 w - - 0 18\nLegal moves (UCI): a1a2 a1b1 a1c1 a1d1 ... | [
{
"role": "assistant",
"content": "e4h7"
}
] |
NeGMF | 1,575 | [
"advantage",
"deflection",
"middlegame",
"veryLong"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . q . r . .\n. . . . b B . k\np . b p . n . p\n. . . . p . . Q\nN p . . . . . P\n. . . . . . . R\nP P P . . P P .\n. . K R . . . .\n\nFEN: r2q1r2/4bB1k/p1bp1n1p/4p2Q/Np5P/7R/PPP2PP1/2KR4 w - - 1 20\nLegal moves (UCI): a2a3 a4b6 a4c3 a4c5 b2b3... | [
{
"role": "assistant",
"content": "h5g6"
}
] |
45hnS | 569 | [
"mate",
"mateIn1",
"middlegame",
"oneMove"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . k . . b . r\np p . . . q . .\n. . p . N . . p\n. . . . P . . .\n. . . . p . . .\n. . . . B . . P\nP P P . . P . .\n. . K R . . . .\n\nFEN: r1k2b1r/pp3q2/2p1N2p/4P3/4p3/4B2P/PPP2P2/2KR4 w - - 0 22\nLegal moves (UCI): a2a3 a2a4 b2b3 b2b4 c1b1 c... | [
{
"role": "assistant",
"content": "d1d8"
}
] |
aqrqx | 2,021 | [
"endgame"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\n. . . . . p . .\n. . k p . . . p\n. . . . p . . P\n. . P b P . P .\np . . P . P . .\nR r K . . . . .\n. . . . . . . .\n\nFEN: 8/5p2/2kp3p/4p2P/2PbP1P1/p2P1P2/RrK5/8 w - - 8 43\nLegal moves (UCI): a2b2 c2c1 c2d1\n\nFind the best m... | [
{
"role": "assistant",
"content": "a2b2"
}
] |
4GRwV | 1,192 | [
"advantage",
"endgame",
"intermezzo",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . r . . .\np . . . . p p k\n. b . . . r . p\n. . . . R . . .\n. . . . . . . .\nP . . . . Q . .\n. P P . . . P P\n. . . . . R . K\n\nFEN: 4r3/p4ppk/1b3r1p/4R3/8/P4Q2/1PP3PP/5R1K b - - 0 26\nLegal moves (UCI): a7a5 a7a6 b6a5 b6c5 b6c7 b6d4 b6... | [
{
"role": "assistant",
"content": "f6f3"
}
] |
p3Xix | 1,793 | [
"advantage",
"endgame",
"veryLong"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . . . . . k\np . p . . p p .\n. . . q . . b .\n. . . N R . . .\n. . . . . . . .\nP . . p . . Q P\n. P . . . . P .\n. . . . . . . K\n\nFEN: r6k/p1p2pp1/3q2b1/3NR3/8/P2p2QP/1P4P1/7K w - - 0 28\nLegal moves (UCI): a3a4 b2b3 b2b4 d5b4 d5b6 d5c3 d... | [
{
"role": "assistant",
"content": "g3h4"
}
] |
8MLac | 1,629 | [
"advantage",
"endgame",
"quietMove",
"veryLong"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\np . . . . p k .\n. p . . p . p .\n. . . . . . Q p\n. P . . . P . P\nq . . . . . . .\n. . r . . . P .\n. . . R . . . K\n\nFEN: 8/p4pk1/1p2p1p1/6Qp/1P3P1P/q7/2r3P1/3R3K w - - 0 30\nLegal moves (UCI): b4b5 d1a1 d1b1 d1c1 d1d2 d1d3 d... | [
{
"role": "assistant",
"content": "g5e5"
}
] |
SI15e | 2,111 | [
"advantage",
"discoveredAttack",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . b q k . . r\np p . . b p p .\n. . n . p . . p\n. . . . . . . .\n. . p . N P . .\n. . . . B N . .\nP P . Q . . P P\n. . . R . R K .\n\nFEN: r1bqk2r/pp2bpp1/2n1p2p/8/2p1NP2/4BN2/PP1Q2PP/3R1RK1 w kq - 0 13\nLegal moves (UCI): a2a3 a2a4 b2b3 b2b4... | [
{
"role": "assistant",
"content": "d2c3"
}
] |
NFwAa | 1,747 | [
"advantage",
"endgame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . k .\n. . . . . p p .\np . . . . . . .\n. p . . . . q p\n. . . . . . . P\n. . . . r Q . .\nP P . . . P P .\n. . . . . . K .\n\nFEN: 6k1/5pp1/p7/1p4qp/7P/4rQ2/PP3PP1/6K1 w - - 0 31\nLegal moves (UCI): a2a3 a2a4 b2b3 b2b4 f2e3 f3a8 f3b7 ... | [
{
"role": "assistant",
"content": "f3a8"
}
] |
7tY3p | 404 | [
"mate",
"mateIn1",
"middlegame",
"oneMove",
"queensideAttack"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . r k . b . r\n. b q . . . p p\np . . . Q . . .\n. . . p . . . .\n. . . . . P P P\n. . . . B . . .\nP P P . N . . .\n. . K R . . . R\n\nFEN: 2rk1b1r/1bq3pp/p3Q3/3p4/5PPP/4B3/PPP1N3/2KR3R b - - 0 21\nLegal moves (UCI): a6a5 b7a8 b7c6 c7a5 c7b6 c... | [
{
"role": "assistant",
"content": "c7c2"
}
] |
Y5fq4 | 902 | [
"endgame",
"mate",
"mateIn1",
"oneMove"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. q . . . . k r\n. . . . . p . p\np . . . . Q n .\n. . . p P . . .\n. . . . . . . .\n. . P . P . . .\nP . . . . . P P\n. . . . . R K .\n\nFEN: 1q4kr/5p1p/p4Qn1/3pP3/8/2P1P3/P5PP/5RK1 w - - 0 25\nLegal moves (UCI): a2a3 a2a4 c3c4 e3e4 e5e6 f1a1 f1... | [
{
"role": "assistant",
"content": "f6f7"
}
] |
hkZlT | 748 | [
"kingsideAttack",
"mate",
"mateIn1",
"oneMove",
"opening"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr n . q . r k .\n. . p . b . p .\np . . p P . . p\n. p . n . N . b\n. . . . . . . .\n. . Q B . . . .\nP P . B . P P P\nR N . . K . . R\n\nFEN: rn1q1rk1/2p1b1p1/p2pP2p/1p1n1N1b/8/2QB4/PP1B1PPP/RN2K2R w KQ - 7 17\nLegal moves (UCI): a2a3 a2a4 b1a3 ... | [
{
"role": "assistant",
"content": "c3g7"
}
] |
8BZpR | 400 | [
"backRankMate",
"endgame",
"mate",
"mateIn2",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . r . . k\n. . R . . . . p\n. B . . r . p .\n. . . . . p . .\nP . . . . . . .\n. P . . . . . .\n. . . . . P P P\n. . . R . . K .\n\nFEN: 4r2k/2R4p/1B2r1p1/5p2/P7/1P6/5PPP/3R2K1 b - - 0 31\nLegal moves (UCI): e6b6 e6c6 e6d6 e6e1 e6e2 e6e3 e6... | [
{
"role": "assistant",
"content": "e6e1"
}
] |
Ude3L | 1,628 | [
"advantage",
"endgame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . . r k .\n. p p . . . p p\np . . . . . . .\n. . . . q n . .\n. . . . Q . . .\n. . P . . . . P\nP P . N . . P .\nR . . . . . K .\n\nFEN: 5rk1/1pp3pp/p7/4qn2/4Q3/2P4P/PP1N2P1/R5K1 b - - 0 23\nLegal moves (UCI): a6a5 b7b5 b7b6 c7c5 c7c6 e5a5 ... | [
{
"role": "assistant",
"content": "e5c5"
}
] |
seeLf | 1,664 | [
"advantage",
"hangingPiece",
"intermezzo",
"long",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . b k . . r .\n. . r . b p . .\np . P N . . . .\n. . B . . q . .\n. . . . . . . p\n. Q P . . . . P\nP . . . . . P .\n. . . R R . K .\n\nFEN: 2bk2r1/2r1bp2/p1PN4/2B2q2/7p/1QP4P/P5P1/3RR1K1 b - - 0 30\nLegal moves (UCI): a6a5 c7a7 c7b7 c7c6 c7d7 ... | [
{
"role": "assistant",
"content": "f5c5"
}
] |
z8tTG | 1,767 | [
"crushing",
"endgame",
"long",
"rookEndgame",
"trappedPiece"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . k .\n. p p . . p p .\n. . . . . . . p\np . . p . . . .\n. . . . . . . .\n. . P r . P . P\nP P . . R K . .\n. . . . . . . .\n\nFEN: 6k1/1pp2pp1/7p/p2p4/8/2Pr1P1P/PP2RK2/8 w - - 0 28\nLegal moves (UCI): a2a3 a2a4 b2b3 b2b4 c3c4 e2c2 e2d... | [
{
"role": "assistant",
"content": "e2e8"
}
] |
4Yvw3 | 1,573 | [
"crushing",
"deflection",
"endgame",
"master",
"masterVsMaster",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . r . . . b .\n. . . Q R . . .\n. . . . . p p k\n. . q . . . . .\np . . . . . . .\n. . . . . . P .\n. . . . . P B .\n. . . . . . K .\n\nFEN: 2r3b1/3QR3/5ppk/2q5/p7/6P1/5PB1/6K1 w - - 4 44\nLegal moves (UCI): d7a4 d7a7 d7b5 d7b7 d7c6 d7c7 d7c8 d... | [
{
"role": "assistant",
"content": "d7h3"
}
] |
0ZIU1 | 1,397 | [
"crushing",
"fork",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . r . k . .\n. . . n q p p .\n. . . . . . Q .\np . . P . . . r\n. . . . P R . P\n. . N K . . . .\nP P . . . . P .\nR . . . . . . .\n\nFEN: 3r1k2/3nqpp1/6Q1/p2P3r/4PR1P/2NK4/PP4P1/R7 b - - 0 25\nLegal moves (UCI): a5a4 d7b6 d7b8 d7c5 d7e5 d7f6... | [
{
"role": "assistant",
"content": "d7e5"
}
] |
syYwL | 1,229 | [
"advancedPawn",
"crushing",
"endgame",
"long",
"promotion",
"rookEndgame"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\n. . . . . . . P\n. . . . . . . .\n. . . . . . . .\n. . . . . . R .\n. p k . . . K .\n. . . . . . . .\n. . . . . . . r\n\nFEN: 8/7P/8/8/6R1/1pk3K1/8/7r w - - 1 43\nLegal moves (UCI): g3f2 g3f3 g3f4 g3g2 g4a4 g4b4 g4c4 g4d4 g4e4 g4... | [
{
"role": "assistant",
"content": "g4h4"
}
] |
psAuO | 422 | [
"endgame",
"mate",
"mateIn1",
"oneMove"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . q . k .\np p . . . . b .\n. . p . . . . B\n. . . p . . Q .\n. . n . . . . .\n. . . . . . . P\nP . . . . . P .\n. . . . . . . K\n\nFEN: 4q1k1/pp4b1/2p4B/3p2Q1/2n5/7P/P5P1/7K w - - 0 35\nLegal moves (UCI): a2a3 a2a4 g2g3 g2g4 g5c1 g5d2 g5d5... | [
{
"role": "assistant",
"content": "g5g7"
}
] |
lYs0X | 1,289 | [
"clearance",
"mate",
"mateIn2",
"middlegame",
"sacrifice",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . . . Q R\n. . . . . p . .\np . . p . k . .\n. . n . r . . .\n. . . . . . B .\n. P . . . P . .\nP P q . . . . .\nK R . . . . . .\n\nFEN: 6QR/5p2/p2p1k2/2n1r3/6B1/1P3P2/PPq5/KR6 b - - 9 33\nLegal moves (UCI): a6a5 c2b1 c2b2 c2b3 c2c1 c2c3 c2... | [
{
"role": "assistant",
"content": "c5b3"
}
] |
FOZba | 1,203 | [
"attraction",
"crushing",
"endgame",
"fork",
"veryLong"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . k .\n. . . . . . p .\n. . . . . . . .\nR . . . . . N .\n. . p b . . P .\n. . . . . . K P\n. . . . . r . .\n. . . . . . . .\n\nFEN: 6k1/6p1/8/R5N1/2pb2P1/6KP/5r2/8 w - - 0 39\nLegal moves (UCI): a5a1 a5a2 a5a3 a5a4 a5a6 a5a7 a5a8 a5b5 ... | [
{
"role": "assistant",
"content": "a5a8"
}
] |
fAMM5 | 641 | [
"backRankMate",
"endgame",
"mate",
"mateIn2",
"rookEndgame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . k .\np . . R . p r p\n. . . . . . . .\n. . . . . . . .\n. . . . . . . .\n. . . . . . p .\n. . . . . . K P\n. . . . r . . .\n\nFEN: 6k1/p2R1prp/8/8/8/6p1/6KP/4r3 w - - 0 34\nLegal moves (UCI): d7a7 d7b7 d7c7 d7d1 d7d2 d7d3 d7d4 d7d5 d7... | [
{
"role": "assistant",
"content": "d7d8"
}
] |
HNmay | 678 | [
"advantage",
"endgame",
"fork",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\np p k . . . . .\n. . p . . . . .\n. . N p . . r p\n. . . P . . . .\n. . . . . . . .\nP P P . . P . .\n. . . . K . . .\n\nFEN: 8/ppk5/2p5/2Np2rp/3P4/8/PPP2P2/4K3 w - - 0 35\nLegal moves (UCI): a2a3 a2a4 b2b3 b2b4 c2c3 c2c4 c5a4 c5... | [
{
"role": "assistant",
"content": "c5e6"
}
] |
EE0uV | 1,837 | [
"crushing",
"long",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. r . . . r k .\np . q . . p p p\nb . . N p . . .\np . . p N . . .\n. . p P n . . .\nQ . . . P . . P\nP R P . . P P .\n. R . . . . K .\n\nFEN: 1r3rk1/p1q2ppp/b2Np3/p2pN3/2pPn3/Q3P2P/PRP2PP1/1R4K1 w - - 1 23\nLegal moves (UCI): a3a4 a3a5 a3b3 a3b4... | [
{
"role": "assistant",
"content": "b2b8"
}
] |
IGznX | 1,495 | [
"crushing",
"endgame",
"interference",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . r .\n. . . b . . . .\n. . . p . k . .\np . p P . . . p\nP p P . . p . .\n. P . . . R r P\n. . . . . . B K\n. . . . R . . .\n\nFEN: 6r1/3b4/3p1k2/p1pP3p/PpP2p2/1P3RrP/6BK/4R3 w - - 0 39\nLegal moves (UCI): e1a1 e1b1 e1c1 e1d1 e1e2 e1e3... | [
{
"role": "assistant",
"content": "f3f4"
}
] |
O7QDi | 1,692 | [
"attraction",
"clearance",
"crushing",
"endgame",
"fork",
"long"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. B . . . . k .\n. . . . . p . .\n. Q P . . . . p\np . . r b . p .\n. . . . . . . .\n. . . . P . . P\n. . . . . P P K\n. . . q . . . .\n\nFEN: 1B4k1/5p2/1QP4p/p2rb1p1/8/4P2P/5PPK/3q4 w - - 2 38\nLegal moves (UCI): b8e5 f2f4 g2g3\n\nFind the best ... | [
{
"role": "assistant",
"content": "b8e5"
}
] |
YbHbJ | 806 | [
"advantage",
"endgame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . r . k .\n. p . . . . p .\np . n . . . . p\n. . . p B . . .\n. . . . . . P .\nP . . K . N . .\n. P . . . . . .\n. . . . . R . .\n\nFEN: 4r1k1/1p4p1/p1n4p/3pB3/6P1/P2K1N2/1P6/5R2 b - - 0 31\nLegal moves (UCI): a6a5 b7b5 b7b6 c6a5 c6a7 c6b4 ... | [
{
"role": "assistant",
"content": "c6e5"
}
] |
mMlkb | 1,533 | [
"advantage",
"clearance",
"long",
"master",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . . . . k .\n. . . . . . b .\np . b q N n . r\n. p . p . B . p\n. . . Q . . . .\n. . P . . . . P\nP P . . . P P .\nR . . . R . K .\n\nFEN: r5k1/6b1/p1bqNn1r/1p1p1B1p/3Q4/2P4P/PP3PP1/R3R1K1 w - - 4 23\nLegal moves (UCI): a1b1 a1c1 a1d1 a2a3 a2... | [
{
"role": "assistant",
"content": "e6g7"
}
] |
M0Ebx | 2,541 | [
"advantage",
"long",
"middlegame",
"pin",
"queensideAttack"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\nr . . . . . . r\np . . . k P b p\n. . . . . . . .\nq p . . N . . .\n. n . p . . . .\n. P . . P . . P\nP B P P Q . . .\n. K . R . . N R\n\nFEN: r6r/p3kPbp/8/qp2N3/1n1p4/1P2P2P/PBPPQ3/1K1R2NR b - - 0 20\nLegal moves (UCI): a5a2 a5a3 a5a4 a5a6 a5b6 ... | [
{
"role": "assistant",
"content": "a5a2"
}
] |
3mwFO | 1,602 | [
"endgame",
"mate",
"mateIn1",
"oneMove"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . R . b . . .\nR . P . . . p k\n. . . Q N . . .\nK . . p P p P .\n. . . . . . . .\n. . . . . . . .\n. q . . . . . .\n. . . . . . . .\n\nFEN: 2R1b3/R1P3pk/3QN3/K2pPpP1/8/8/1q6/8 b - - 20 51\nLegal moves (UCI): b2a1 b2a2 b2a3 b2b1 b2b3 b2b4 b2b5 ... | [
{
"role": "assistant",
"content": "b2b5"
}
] |
WkYfS | 1,122 | [
"advantage",
"fork",
"master",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\nr . . q r n k .\np p . b . . p p\n. . . . . . . .\n. . . P . . . .\n. . . B . . . .\n. P . B . . . .\nP . . N . . P K\nR . . Q . R . .\n\nFEN: r2qrnk1/pp1b2pp/8/3P4/3B4/1P1B4/P2N2PK/R2Q1R2 b - - 0 18\nLegal moves (UCI): a7a5 a7a6 a8b8 a8c8 b7b5 b... | [
{
"role": "assistant",
"content": "d8h4"
}
] |
SFdei | 966 | [
"advancedPawn",
"crushing",
"endgame",
"pawnEndgame",
"promotion",
"quietMove",
"veryLong"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . . . . .\n. . . . . . . .\n. . . . . . . .\n. . . k p . K .\n. . . . . . P .\n. . . . . . . .\n. . . . . . . .\n. . . . . . . .\n\nFEN: 8/8/8/3kp1K1/6P1/8/8/8 b - - 0 63\nLegal moves (UCI): d5c4 d5c5 d5c6 d5d4 d5d6 d5e4 d5e6 e5e4\n\nFind t... | [
{
"role": "assistant",
"content": "e5e4"
}
] |
I6DON | 1,764 | [
"advantage",
"long",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . r r k .\n. . q . . . p p\n. . N . R . . .\n. . P p . . . .\np . b Q . . . .\n. . . . . . . .\nP P . . . P P P\n. . . . R . K .\n\nFEN: 4rrk1/2q3pp/2N1R3/2Pp4/p1bQ4/8/PP3PPP/4R1K1 b - - 2 22\nLegal moves (UCI): a4a3 c4a2 c4a6 c4b3 c4b5 c4d... | [
{
"role": "assistant",
"content": "c7c6"
}
] |
WWX5O | 2,227 | [
"advantage",
"middlegame",
"short",
"trappedPiece"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\nr n r b . . k .\n. . . q . p p .\n. n . . p . . p\nR P . . . . . .\n. Q p P P . . .\n. . N . B . P .\n. P . . . P B P\n. . . . . R K .\n\nFEN: rnrb2k1/3q1pp1/1n2p2p/RP6/1QpPP3/2N1B1P1/1P3PBP/5RK1 b - - 0 20\nLegal moves (UCI): a8a5 a8a6 a8a7 b6a4... | [
{
"role": "assistant",
"content": "d8e7"
}
] |
wBSmF | 2,366 | [
"clearance",
"crushing",
"middlegame",
"pin",
"sacrifice",
"veryLong"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . q . . . r\n. b p k b . p .\np . . . . . . p\n. . p P p . . Q\n. . . . . . . .\n. . N . . . . .\nP P . . . P P P\nR . . . R . K .\n\nFEN: r2q3r/1bpkb1p1/p6p/2pPp2Q/8/2N5/PP3PPP/R3R1K1 w - - 2 18\nLegal moves (UCI): a1b1 a1c1 a1d1 a2a3 a2a4 b... | [
{
"role": "assistant",
"content": "h5g4"
}
] |
00C8Y | 930 | [
"mate",
"mateIn1",
"middlegame",
"oneMove"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\nr n b . . r k .\np p . . . p . p\n. . . p . . P b\n. . . . p . q .\n. . . p Q . . .\n. . . . . N . .\nP P P . P P P .\nR N . . K B . R\n\nFEN: rnb2rk1/pp3p1p/3p2Pb/4p1q1/3pQ3/5N2/PPP1PPP1/RN2KB1R b KQ - 2 12\nLegal moves (UCI): a7a5 a7a6 b7b5 b7b... | [
{
"role": "assistant",
"content": "g5c1"
}
] |
HQHsI | 1,476 | [
"dovetailMate",
"endgame",
"master",
"mate",
"mateIn1",
"oneMove"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\np . . Q . . . p\n. . . . . . p .\n. . r . p . . .\np q k . . . . .\n. . . . . . P .\n. . . . . P . P\n. . . R . . K .\n\nFEN: 8/p2Q3p/6p1/2r1p3/pqk5/6P1/5P1P/3R2K1 w - - 2 42\nLegal moves (UCI): d1a1 d1b1 d1c1 d1d2 d1d3 d1d4 d1d5... | [
{
"role": "assistant",
"content": "d7d3"
}
] |
Lf2wX | 1,100 | [
"advancedPawn",
"crushing",
"defensiveMove",
"endgame",
"long"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\n. . . . . . . .\n. . . r . . . P\n. . . . . . R .\n. k . . . . P .\n. . . . . b . .\n. . . . . . . K\n. . . . . . . .\n\nFEN: 8/8/3r3P/6R1/1k4P1/5b2/7K/8 w - - 1 50\nLegal moves (UCI): g5a5 g5b5 g5c5 g5d5 g5e5 g5f5 g5g6 g5g7 g5g8... | [
{
"role": "assistant",
"content": "h6h7"
}
] |
h8DXB | 557 | [
"crushing",
"endgame",
"fork",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\n. . . . . . . .\n. . . . . . . p\n. . . k . p . .\nb . N . p . p P\n. . . . P . P .\n. . . . . P . .\n. . . . K . . .\n\nFEN: 8/8/7p/3k1p2/b1N1p1pP/4P1P1/5P2/4K3 w - - 4 50\nLegal moves (UCI): c4a3 c4a5 c4b2 c4b6 c4d2 c4d6 c4e5 e... | [
{
"role": "assistant",
"content": "c4b6"
}
] |
bgTN7 | 2,561 | [
"attraction",
"crushing",
"kingsideAttack",
"master",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . r . . k .\n. p . . . p b p\np . b q . . p .\n. . . . . . Q .\n. . B B . R . .\n. P . . . P . .\nP . . . . . P P\n. . . . . . K .\n\nFEN: 3r2k1/1p3pbp/p1bq2p1/6Q1/2BB1R2/1P3P2/P5PP/6K1 w - - 2 29\nLegal moves (UCI): a2a3 a2a4 b3b4 c4a6 c4b5 ... | [
{
"role": "assistant",
"content": "d4g7"
}
] |
PkTzw | 2,029 | [
"crushing",
"long",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . r . . k .\np . q r b p p p\n. p n . . n . .\n. . p . p . . .\n. P . . b . . .\nP Q P . . N P .\n. B . N . P B P\n. . . R R . K .\n\nFEN: 3r2k1/p1qrbppp/1pn2n2/2p1p3/1P2b3/PQP2NP1/1B1N1PBP/3RR1K1 w - - 0 18\nLegal moves (UCI): a3a4 b2a1 b2c1... | [
{
"role": "assistant",
"content": "d2e4"
}
] |
wh7iV | 727 | [
"endgame",
"mate",
"mateIn2",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . k .\n. . . . . p p .\n. . . . p b . p\n. p . . . . . .\n. . . . . . . .\n. . . . . P . .\n. . . . . P K P\nr B R . . . . .\n\nFEN: 6k1/5pp1/4pb1p/1p6/8/5P2/5PKP/rBR5 w - - 2 28\nLegal moves (UCI): b1a2 b1c2 b1d3 b1e4 b1f5 b1g6 b1h7 c1... | [
{
"role": "assistant",
"content": "c1c8"
}
] |
j9fJz | 1,389 | [
"crushing",
"discoveredAttack",
"kingsideAttack",
"long",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . r . k .\np p p . r p . .\n. . . . q P p p\n. . . . . . . .\n. . P . . . . .\n. . . Q . . . P\nP P B . . . P .\n. . . . R R K .\n\nFEN: 4r1k1/ppp1rp2/4qPpp/8/2P5/3Q3P/PPB3P1/4RRK1 b - - 0 21\nLegal moves (UCI): a7a5 a7a6 b7b5 b7b6 c7c5 c7c... | [
{
"role": "assistant",
"content": "e6b6"
}
] |
jyXSI | 1,546 | [
"advantage",
"middlegame",
"pin",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . . . r . k\np p . . . . . q\n. . p . . p . .\n. . N . p . n .\n. . . p . . p .\nP . . Q . . . .\n. P B . . P K .\nR . . . . . . .\n\nFEN: r4r1k/pp5q/2p2p2/2N1p1n1/3p2p1/P2Q4/1PB2PK1/R7 w - - 0 36\nLegal moves (UCI): a1a2 a1b1 a1c1 a1d1 a1e1 ... | [
{
"role": "assistant",
"content": "a1h1"
}
] |
Lp6uB | 1,921 | [
"advantage",
"deflection",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . k .\n. . q . . . p p\n. p . . p n . .\np P . p . . . .\nP . . P . n . .\nB . r . . . N .\n. . . Q . . P P\nR . . . . . . K\n\nFEN: 6k1/2q3pp/1p2pn2/pP1p4/P2P1n2/B1r3N1/3Q2PP/R6K w - - 0 29\nLegal moves (UCI): a1a2 a1b1 a1c1 a1d1 a1e1 ... | [
{
"role": "assistant",
"content": "a3d6"
}
] |
zfZEo | 966 | [
"advantage",
"endgame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nb . . . . r k .\nP . . . . p p p\n. . . . p . . .\n. p b . . . . .\n. p p . . . . .\n. . . . . P P .\n. . . B . . K P\nR R . . . . . .\n\nFEN: b4rk1/P4ppp/4p3/1pb5/1pp5/5PP1/3B2KP/RR6 w - - 3 29\nLegal moves (UCI): a1a2 a1a3 a1a4 a1a5 a1a6 b1b2 b... | [
{
"role": "assistant",
"content": "d2b4"
}
] |
vjBVy | 1,937 | [
"blindSwineMate",
"mate",
"mateIn2",
"middlegame",
"sacrifice",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nR . n r . . . .\n. k . . . p p .\n. p . . . . . .\n. P . p . . . .\n. . . P p q . .\n. . P . . . . .\nQ . . N . P . r\nR . . . . K . .\n\nFEN: R1nr4/1k3pp1/1p6/1P1p4/3Ppq2/2P5/Q2N1P1r/R4K2 w - - 3 27\nLegal moves (UCI): a1b1 a1c1 a1d1 a1e1 a2a3 a... | [
{
"role": "assistant",
"content": "a2a7"
}
] |
NURl9 | 981 | [
"crushing",
"endgame",
"fork",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . b r . .\n. . . . . . k .\n. . . . . . . .\n. . R . . p . .\n. . . . . N . .\n. P . . . . . .\n. K . . . . . .\n. . . . . . . .\n\nFEN: 4br2/6k1/8/2R2p2/5N2/1P6/1K6/8 w - - 3 40\nLegal moves (UCI): b2a1 b2a2 b2a3 b2b1 b2c1 b2c2 b2c3 b3b4 c... | [
{
"role": "assistant",
"content": "f4e6"
}
] |
z8EqQ | 857 | [
"advancedPawn",
"crushing",
"endgame",
"long"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\n. . . . . . . .\n. . . . B k . .\n. P . . . . . .\n. . . p . . . p\n. . . P n . . .\n. . . . . K p .\n. . . . . . . .\n\nFEN: 8/8/4Bk2/1P6/3p3p/3Pn3/5Kp1/8 w - - 1 52\nLegal moves (UCI): b5b6 e6a2 e6b3 e6c4 e6c8 e6d5 e6d7 e6f5 e6... | [
{
"role": "assistant",
"content": "b5b6"
}
] |
qpSCf | 651 | [
"mate",
"mateIn1",
"middlegame",
"oneMove"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . . . r k .\n. p p . . p b .\n. . . . . . . p\np . . . p . q .\n. . . . Q . . .\n. . . B P . . .\nP P P N . P P .\n. . K b . . N .\n\nFEN: r4rk1/1pp2pb1/7p/p3p1q1/4Q3/3BP3/PPPN1PP1/2Kb2N1 w - - 0 17\nLegal moves (UCI): a2a3 a2a4 b2b3 b2b4 c1b... | [
{
"role": "assistant",
"content": "e4h7"
}
] |
daW7m | 775 | [
"crushing",
"discoveredAttack",
"endgame",
"master",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . . . k .\n. . . . . p . .\np . . q . . p p\n. . . . p . . .\n. P N b . . . .\nP . . Q . . P .\n. . . . . P . P\n. . . . . . K .\n\nFEN: 6k1/5p2/p2q2pp/4p3/1PNb4/P2Q2P1/5P1P/6K1 b - - 0 32\nLegal moves (UCI): a6a5 d4a1 d4a7 d4b2 d4b6 d4c3 d... | [
{
"role": "assistant",
"content": "d4f2"
}
] |
3fkJJ | 2,153 | [
"bishopEndgame",
"crushing",
"endgame",
"master",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . . . . .\n. p . . . . . .\np . . . k . . .\n. b P . p . . p\n. . . p P p . P\n. P . . . P . .\n. P . K . B . .\n. . . . . . . .\n\nFEN: 8/1p6/p3k3/1bP1p2p/3pPp1P/1P3P2/1P1K1B2/8 b - - 1 32\nLegal moves (UCI): a6a5 b5a4 b5c4 b5c6 b5d3 b5d7 ... | [
{
"role": "assistant",
"content": "e6d7"
}
] |
lkwNG | 961 | [
"advantage",
"endgame",
"fork",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . k .\n. . . . . p . p\np . . . p . p .\nr . . . . . . .\n. p . . q P . .\nP B . . . . P .\nK P . . . . . P\n. . . Q . . . .\n\nFEN: 6k1/5p1p/p3p1p1/r7/1p2qP2/PB4P1/KP5P/3Q4 w - - 0 33\nLegal moves (UCI): a2a1 a3a4 b3a4 b3c2 b3c4 b3d5 b... | [
{
"role": "assistant",
"content": "d1d8"
}
] |
gNFkE | 946 | [
"advantage",
"deflection",
"endgame",
"master",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nR . . . . . . .\n. . r . . . . .\n. . . p . . . p\n. . . P k b p .\n. . . . . . B .\n. . . . K . . P\n. . . . . . P .\n. . . . . . . .\n\nFEN: R7/2r5/3p3p/3Pkbp1/6B1/4K2P/6P1/8 w - - 0 46\nLegal moves (UCI): a8a1 a8a2 a8a3 a8a4 a8a5 a8a6 a8a7 a8b... | [
{
"role": "assistant",
"content": "a8e8"
}
] |
CuicE | 1,891 | [
"attraction",
"crushing",
"kingsideAttack",
"master",
"masterVsMaster",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . . r k .\np p . . . p p p\n. . p . . q . .\n. . n . . P . .\n. . . . . . Q .\n. . N . . . P .\nP P p r . R B P\n. . R . . . K .\n\nFEN: 5rk1/pp3ppp/2p2q2/2n2P2/6Q1/2N3P1/PPpr1RBP/2R3K1 b - - 3 18\nLegal moves (UCI): a7a5 a7a6 b7b5 b7b6 c5a... | [
{
"role": "assistant",
"content": "d2f2"
}
] |
tS4CG | 1,879 | [
"advantage",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . r r k .\n. p . N q p . .\np . p . . . p .\n. . . p . . . .\n. P . P . . Q n\nP . . . P . . P\n. B . n . P P .\n. . R R . . K .\n\nFEN: 4rrk1/1p1Nqp2/p1p3p1/3p4/1P1P2Qn/P3P2P/1B1n1PP1/2RR2K1 b - - 5 25\nLegal moves (UCI): a6a5 b7b5 b7b6 c6... | [
{
"role": "assistant",
"content": "f7f5"
}
] |
NWv53 | 935 | [
"endgame",
"mate",
"mateIn1",
"oneMove"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . . . . . k\np p . . R . r .\n. . p . . . . p\n. . . p Q . . .\n. . . . . . . .\n. P . . . . P b\n. . q . . . . .\n. . . . . . . K\n\nFEN: r6k/pp2R1r1/2p4p/3pQ3/8/1P4Pb/2q5/7K w - - 4 37\nLegal moves (UCI): b3b4 e5a1 e5b2 e5b8 e5c3 e5c7 e5d4 ... | [
{
"role": "assistant",
"content": "e5g7"
}
] |
5b3n3 | 1,322 | [
"endgame",
"mate",
"mateIn1",
"oneMove",
"rookEndgame"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . . . . .\n. p . . k . . .\np . . . p . p .\n. . P . K p P .\nP . . . . P . .\n. . P r . . . .\n. P . . . . . R\n. . . . . . . .\n\nFEN: 8/1p2k3/p3p1p1/2P1KpP1/P4P2/2Pr4/1P5R/8 b - - 10 45\nLegal moves (UCI): a6a5 b7b5 b7b6 d3c3 d3d1 d3d2 d... | [
{
"role": "assistant",
"content": "d3d5"
}
] |
vCxGv | 1,018 | [
"backRankMate",
"mate",
"mateIn2",
"middlegame",
"sacrifice",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\nr . . . . . k .\n. . . . . r p .\np . p . . . . p\n. . . . . . . .\n. . R . . . Q .\n. P B . . . . .\nP . . q . . P P\n. . . . R . . K\n\nFEN: r5k1/5rp1/p1p4p/8/2R3Q1/1PB5/P2q2PP/4R2K b - - 0 24\nLegal moves (UCI): a6a5 a8a7 a8b8 a8c8 a8d8 a8e8 a... | [
{
"role": "assistant",
"content": "d2e1"
}
] |
CCByK | 956 | [
"mate",
"mateIn1",
"middlegame",
"oneMove",
"queensideAttack"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\nr . b . k . . r\np p . . . p b .\n. . . . p q . .\n. N n p . . . p\n. . . . . P . N\n. . . . P . . .\nP P P Q . . P .\n. . K R . B . R\n\nFEN: r1b1k2r/pp3pb1/4pq2/1Nnp3p/5P1N/4P3/PPPQ2P1/2KR1B1R b kq - 1 16\nLegal moves (UCI): a7a5 a7a6 a8b8 b7b6... | [
{
"role": "assistant",
"content": "f6b2"
}
] |
5V4mb | 1,759 | [
"crushing",
"endgame",
"master",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . b . . k\np . . . q p . p\n. p . . . p . .\n. . p . . B . .\n. . P . . . . .\n. . . . . . Q .\nP P . . . . P .\n. . . . . . . K\n\nFEN: 4b2k/p3qp1p/1p3p2/2p2B2/2P5/6Q1/PP4P1/7K w - - 2 29\nLegal moves (UCI): a2a3 a2a4 b2b3 b2b4 f5b1 f5c2 f... | [
{
"role": "assistant",
"content": "g3h4"
}
] |
8sj61 | 1,479 | [
"advantage",
"capturingDefender",
"fork",
"long",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . . k b . r\np p p . . p p p\n. . . . . n . .\n. . . . p R . .\n. . . . q . . .\n. . P Q . . . .\nP P . P . . P P\nR N B . . . K .\n\nFEN: r3kb1r/ppp2ppp/5n2/4pR2/4q3/2PQ4/PP1P2PP/RNB3K1 w kq - 0 13\nLegal moves (UCI): a2a3 a2a4 b1a3 b2b3 b2b... | [
{
"role": "assistant",
"content": "d3e4"
}
] |
VYtdm | 2,361 | [
"crushing",
"endgame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . r k .\nQ . . . R p . .\np p . . . . p p\n. . . B . . . .\n. . n . . q . P\n. . . . . . . .\nP . . . . P P .\n. . . . . . K .\n\nFEN: 5rk1/Q3Rp2/pp4pp/3B4/2n2q1P/8/P4PP1/6K1 w - - 8 38\nLegal moves (UCI): a2a3 a2a4 a7a6 a7a8 a7b6 a7b7 a7... | [
{
"role": "assistant",
"content": "g2g3"
}
] |
Bc8hs | 1,951 | [
"mate",
"mateIn2",
"middlegame",
"pin",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . r . . . k\n. p . . . Q p .\np . . P N . . p\nb . p . r . . .\n. . B . n . . .\n. . . . B . . P\nP P . . K P q .\nR . . R . . . .\n\nFEN: 3r3k/1p3Qp1/p2PN2p/b1p1r3/2B1n3/4B2P/PP2KPq1/R2R4 b - - 1 26\nLegal moves (UCI): a5b4 a5b6 a5c3 a5c7 a5... | [
{
"role": "assistant",
"content": "e4g3"
}
] |
7VsRp | 2,269 | [
"advancedPawn",
"crushing",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. r b . . r k .\np . . . . p b .\n. . . . . . . .\n. . . . . P . Q\n. . . q B R . .\n. . . . . . . .\nP p P . . . P P\n. . . . . R . K\n\nFEN: 1rb2rk1/p4pb1/8/5P1Q/3qBR2/8/PpP3PP/5R1K w - - 1 23\nLegal moves (UCI): a2a3 a2a4 c2c3 c2c4 e4a8 e4b7 e... | [
{
"role": "assistant",
"content": "f5f6"
}
] |
ylVyg | 2,135 | [
"advantage",
"middlegame",
"pin",
"quietMove",
"veryLong"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. k . b . . r .\np p p . . . . .\n. . . p q . . .\n. . . N p . . .\n. . . n P . . .\nP . P . . . . P\n. P . . . P . N\n. R . Q . R . K\n\nFEN: 1k1b2r1/ppp5/3pq3/3Np3/3nP3/P1P4P/1P3P1N/1R1Q1R1K b - - 2 24\nLegal moves (UCI): a7a5 a7a6 b7b5 b7b6 b8... | [
{
"role": "assistant",
"content": "e6h3"
}
] |
6Jjtn | 1,916 | [
"capturingDefender",
"crushing",
"discoveredAttack",
"endgame",
"long"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . k . . r . r\np p . n . P . .\n. . p . p . . p\n. . . . . . . .\n. . P . . . . .\nP . . . . . . .\n. P . B . . P .\n. . K R . R . .\n\nFEN: 2k2r1r/pp1n1P2/2p1p2p/8/2P5/P7/1P1B2P1/2KR1R2 w - - 1 26\nLegal moves (UCI): a3a4 b2b3 b2b4 c1b1 c1c2 c... | [
{
"role": "assistant",
"content": "d2b4"
}
] |
spMhO | 1,163 | [
"bishopEndgame",
"crushing",
"deflection",
"endgame",
"master",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. B . . . . . .\n. . . . . . . .\n. . p . . . . .\n. p . . p k . .\np . p . b . . .\nP . P . K . P p\n. P . . . . . P\n. . . . . . . .\n\nFEN: 1B6/8/2p5/1p2pk2/p1p1b3/P1P1K1Pp/1P5P/8 w - - 2 48\nLegal moves (UCI): b2b3 b2b4 b8a7 b8c7 b8d6 b8e5 e3... | [
{
"role": "assistant",
"content": "g3g4"
}
] |
Oi28r | 2,084 | [
"advantage",
"fork",
"long",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . r r k .\np . . . . p p p\n. p . Q . n . .\n. . . p . . R .\n. . . . . B . .\n. . . . . N P .\nP q . . . P . P\n. . . . R . K .\n\nFEN: 4rrk1/p4ppp/1p1Q1n2/3p2R1/5B2/5NP1/Pq3P1P/4R1K1 b - - 5 24\nLegal moves (UCI): a7a5 a7a6 b2a1 b2a2 b2a3... | [
{
"role": "assistant",
"content": "e8e1"
}
] |
9GHHm | 1,702 | [
"attraction",
"mate",
"mateIn2",
"middlegame",
"sacrifice",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . r q .\np p . . . p r k\n. . b . p Q . p\n. . P . . p . .\n. . B R . . . .\n. . . . P . . P\nP . . . . P . K\n. . . . . . R .\n\nFEN: 5rq1/pp3prk/2b1pQ1p/2P2p2/2BR4/4P2P/P4P1K/6R1 w - - 4 27\nLegal moves (UCI): a2a3 a2a4 c4a6 c4b3 c4b5 c... | [
{
"role": "assistant",
"content": "f6h6"
}
] |
dikUo | 1,108 | [
"crushing",
"endgame",
"short",
"skewer"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . . . . .\n. . . . . Q p k\n. . . . N . . p\nr . . . . . . .\n. . . . P K . P\n. . . . . . . .\n. . . . . . . .\n. . . . . . r .\n\nFEN: 8/5Qpk/4N2p/r7/4PK1P/8/8/6r1 b - - 0 51\nLegal moves (UCI): a5a1 a5a2 a5a3 a5a4 a5a6 a5a7 a5a8 a5b5 a5c... | [
{
"role": "assistant",
"content": "g1f1"
}
] |
vH3yh | 2,753 | [
"advantage",
"master",
"middlegame",
"pin",
"sacrifice",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . r r . .\np . . . . . . k\n. p . N . . . p\n. P p P . p . q\nP . . . . R n .\n. . . P . . . P\n. . . . P . . .\n. R . . . Q . K\n\nFEN: 4rr2/p6k/1p1N3p/1PpP1p1q/P4Rn1/3P3P/4P3/1R3Q1K b - - 0 28\nLegal moves (UCI): a7a5 a7a6 c5c4 e8a8 e8b8 ... | [
{
"role": "assistant",
"content": "e8e2"
}
] |
QUA5C | 1,070 | [
"advantage",
"endgame",
"fork",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\np . k . q p . p\n. . . . . . p .\n. . . P . . . n\n. . p . . . . .\n. . . . B . . .\nP b . . . P P P\nR . . R . . K .\n\nFEN: 8/p1k1qp1p/6p1/3P3n/2p5/4B3/Pb3PPP/R2R2K1 w - - 0 22\nLegal moves (UCI): a1b1 a1c1 a2a3 a2a4 d1b1 d1c1 ... | [
{
"role": "assistant",
"content": "d5d6"
}
] |
belMk | 1,444 | [
"crushing",
"defensiveMove",
"endgame",
"long",
"zugzwang"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\n. . . . n k p .\n. . p B . . . .\np . P . . K P .\n. . . . . . . .\nP . . . . . . .\n. . . . . . . .\n. . . . . . . .\n\nFEN: 8/4nkp1/2pB4/p1P2KP1/8/P7/8/8 w - - 11 48\nLegal moves (UCI): d6e7 f5e4 f5e5 f5f4 f5g4\n\nFind the best... | [
{
"role": "assistant",
"content": "d6e7"
}
] |
3G64K | 1,093 | [
"endgame",
"mate",
"mateIn2",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. k . . . r r .\np p p . . Q . .\n. . . . . . . p\n. . . . P . . .\n. . . . . . . .\n. . . q . . . .\n. . . . . . P P\n. R R . . . . K\n\nFEN: 1k3rr1/ppp2Q2/7p/4P3/8/3q4/6PP/1RR4K w - - 1 24\nLegal moves (UCI): b1a1 b1b2 b1b3 b1b4 b1b5 b1b6 b1b7 ... | [
{
"role": "assistant",
"content": "f7c7"
}
] |
YFVVc | 881 | [
"advantage",
"fork",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . q . r k .\np p p . . p . p\n. . n . . . p b\n. . . . p . . .\n. . . . N . b .\n. . . P P R . .\nP P P N B . P P\nR . . Q . . K .\n\nFEN: r2q1rk1/ppp2p1p/2n3pb/4p3/4N1b1/3PPR2/PPPNB1PP/R2Q2K1 w - - 7 13\nLegal moves (UCI): a1b1 a1c1 a2a3 a2a... | [
{
"role": "assistant",
"content": "e4f6"
}
] |
WTEui | 1,998 | [
"advantage",
"long",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\nr . . q . r k .\np p p . . p p p\n. . . b p n . .\n. . . p n . B .\n. . . P P . . .\n. . P Q . . . .\nP P . N . P P P\nR . . . . R K .\n\nFEN: r2q1rk1/ppp2ppp/3bpn2/3pn1B1/3PP3/2PQ4/PP1N1PPP/R4RK1 w - - 0 13\nLegal moves (UCI): a1b1 a1c1 a1d1 a1e... | [
{
"role": "assistant",
"content": "d4e5"
}
] |
UGBbn | 961 | [
"crushing",
"endgame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. k . r . . . .\np p p . . p . .\n. . p . . . . .\n. . . . . . . Q\n. . . P . . . .\n. . P K P . . .\n. . . . q . r .\n. . . R . . . R\n\nFEN: 1k1r4/ppp2p2/2p5/7Q/3P4/2PKP3/4q1r1/3R3R w - - 2 26\nLegal moves (UCI): d3e4 h5e2\n\nFind the best move... | [
{
"role": "assistant",
"content": "h5e2"
}
] |
92LTi | 1,008 | [
"kingsideAttack",
"mate",
"mateIn2",
"middlegame",
"pillsburysMate",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\nr . . . . . k .\np p p . r . p .\n. . . b q p . .\n. . . . . . . Q\n. . . P . . R .\n. . P . . . . P\nP . . B . P P .\n. . . . R . K .\n\nFEN: r5k1/ppp1r1p1/3bqp2/7Q/3P2R1/2P4P/P2B1PP1/4R1K1 b - - 13 26\nLegal moves (UCI): a7a5 a7a6 a8b8 a8c8 a8d... | [
{
"role": "assistant",
"content": "e6e1"
}
] |
gp1Bw | 2,258 | [
"advantage",
"endgame",
"hangingPiece",
"long"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. . . . r . k .\nR p . . . p . p\n. . . . . P p .\n. . . . . . . .\n. . . P . Q . .\n. . . . . . . P\n. q r . . P P .\n. . . . R . K .\n\nFEN: 4r1k1/Rp3p1p/5Pp1/8/3P1Q2/7P/1qr2PP1/4R1K1 b - - 0 23\nLegal moves (UCI): b2a1 b2a2 b2a3 b2b1 b2b3 b2b4... | [
{
"role": "assistant",
"content": "e8e1"
}
] |
pAYxD | 1,871 | [
"crushing",
"long",
"middlegame"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . r k .\n. . . . . . b .\np . . . . . . p\n. p . P Q . p .\n. . . . . . . .\n. . P . . r . N\n. q . . . . P P\n. . R . . R K .\n\nFEN: 5rk1/6b1/p6p/1p1PQ1p1/8/2P2r1N/1q4PP/2R2RK1 w - - 0 32\nLegal moves (UCI): c1a1 c1b1 c1c2 c1d1 c1e1 c3c... | [
{
"role": "assistant",
"content": "e5e6"
}
] |
BCF6M | 1,445 | [
"crushing",
"master",
"masterVsMaster",
"middlegame",
"short",
"trappedPiece"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\nr . . . . . k .\np . r b q . p .\nR . p . p . Q p\n. . P p P p . P\n. P . P . . P .\n. . . B P . . .\n. P K . . . . .\nR . . . . . . .\n\nFEN: r5k1/p1rbq1p1/R1p1p1Qp/2PpPp1P/1P1P2P1/3BP3/1PK5/R7 b - - 2 39\nLegal moves (UCI): a8b8 a8c8 a8d8 a8e8 ... | [
{
"role": "assistant",
"content": "d7e8"
}
] |
9leJw | 1,360 | [
"crushing",
"kingsideAttack",
"middlegame",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. Black to move.\n\n. n b . . . k .\n. . . . . p p p\n. q p . . n . .\n. . . . . . . .\nB . . . . P . .\n. . . . r . . P\nP P P . N Q P .\nR . . . . R K .\n\nFEN: 1nb3k1/5ppp/1qp2n2/8/B4P2/4r2P/PPP1NQP1/R4RK1 b - - 0 18\nLegal moves (UCI): b6a5 b6a6 b6a7 b6b2 b6b3 b... | [
{
"role": "assistant",
"content": "f6e4"
}
] |
Kz3Kq | 2,346 | [
"advantage",
"endgame",
"fork",
"pin",
"veryLong"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . r . . . . .\np . . . Q . . p\n. . . p . . p .\n. p . . . . . k\n. . . . . . . .\n. . . . . q . P\n. . . R . P . .\n. . . . . . K .\n\nFEN: 2r5/p3Q2p/3p2p1/1p5k/8/5q1P/3R1P2/6K1 w - - 0 35\nLegal moves (UCI): d2a2 d2b2 d2c2 d2d1 d2d3 d2d4 d2d5... | [
{
"role": "assistant",
"content": "e7h7"
}
] |
D9mnM | 1,298 | [
"discoveredCheck",
"doubleCheck",
"endgame",
"mate",
"mateIn2",
"short"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. . . . . . . .\np . . b . . p k\n. . p . . . . p\n. p . . p . . .\n. . . q N . . .\nP . . Q . . . P\n. . . . . . P K\n. . . . . . . .\n\nFEN: 8/p2b2pk/2p4p/1p2p3/3qN3/P2Q3P/6PK/8 w - - 2 31\nLegal moves (UCI): a3a4 d3b1 d3b3 d3b5 d3c2 d3c3 d3c4 ... | [
{
"role": "assistant",
"content": "e4f6"
}
] |
LXMEY | 2,261 | [
"advantage",
"clearance",
"endgame",
"trappedPiece",
"veryLong"
] | [
{
"role": "user",
"content": "Chess puzzle. White to move.\n\n. q . . . . . r\n. . . . . k . .\n. p Q . p . . .\n. . . p P . b p\n. . . P . p p .\nP . . . . . . .\n. P . N K . P .\n. . R . . . . .\n\nFEN: 1q5r/5k2/1pQ1p3/3pP1bp/3P1pp1/P7/1P1NK1P1/2R5 w - - 3 29\nLegal moves (UCI): a3a4 b2b3 b2b4 c1a1 c1b1 c... | [
{
"role": "assistant",
"content": "c6d7"
}
] |
End of preview. Expand in Data Studio
Chess Puzzles Dataset
Summary
The Chess Puzzles dataset is a processed version of the Lichess puzzle database: 6 million positions from real games, each with a single winning move, rated by how hard Lichess players found them. Each puzzle is a prompt showing the board, its FEN and the legal moves, and a completion with the first move of the solution in UCI notation.
Data Structure
- Format: Conversational
- Type: Prompt-completion
Columns:
"prompt": The puzzle: the side to move, the board, its FEN and the legal moves."completion": The first move of the solution, in UCI notation (for examplee2e4)."PuzzleId","Rating","Themes": The Lichess puzzle ID, its rating, and its themes (mateIn2,fork, ...).
The test split holds 1,000 puzzles. Lichess also accepts any move that mates, so a model that answers with another mating move solves the puzzle too.
Generation script
The script used to generate this dataset can be found here.
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Models trained or fine-tuned on trl-lib/chess-puzzles